<?php 
    session_start();
	if(isset($_SESSION["lang"])){
		$lang = $_SESSION["lang"];
		if($lang == "EN") {
			$_SESSION["lang"] = "EN";
			include "en_US.properties.php";
		}
		else {
			$_SESSION["lang"] = "VN";
			include "vi_VN.properties.php";
		}
	} else {
	   $_SESSION["lang"] = "VN";
	   include "vi_VN.properties.php";  
	}
?>